Finishing-tool.



No. 792,780. PATENTED JUNE 20, 19:05. E. KREBS. FINISHING TOOL.

APPLIOATION FILED SEPT.17, 1904.

M JNVEN 7101?. Z 2 W M A 770mm 111 UNITED STATES Patented June 20, 1905.I

PATENT ()FFICE.

EMIL KREBS, OF ELWOOD, INDIANA, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, TO WILLIAM T. OWEN, OF WASHINGTON, DISTRICT OF COLUMBIA.

FINISHING-TOOL.

SPECIFICATION forming part of Letters Patent No. 792,780, dated June 20,1905.

Appli a ion le September 1'7 1904.. Serial No. 224,904.

To all whom it may concern.-

Be it known that I, EMIL KREBS, a citizen of the United States, and aresident of Elwood, Indiana, have invented certain new and useful Improvements in Fin ishing-Tools,of which the following is aspecification.

My invention relates to a finishing tool adapted for use onlamp-chimneys, bottles, or other hollow articles of glassware. It isadapted to open out the ends of such articles, to crimp their loweredges, and to produce a shoulder thereon. I have illustrated myinvention in combination with a lamp-chimney,

although, as before stated, it is applicable to bottles or otherarticles of glassware.

Figure 1 of the drawings represents in longitudinal section atoolembodying my invention and a chimney in connection therewith. Fig. 2 isa plan view of a portion of the device detached from the rest.

It is understood that my finishing tool or device is to be used inconnection with the ordinary horse or lathe on which the open ends oflamp-chimneys and the like are finished. As shown it consists of twopartsa socket 1, which is stationary in the lathe, and an opening orshaping portion 2, whichis revolved thereby. The socket '1 is providedwith a shank 11, in which the shank 21 of the finishing portion 2rotates. The socket 1 is also provided with a smooth cylindric flange12, adapted to limit the outer periphery of the bottom of the chimney 3,formed therein, and with an inner transverse flange provided withlongitudinally -projecting radially-disposed teeth 13, adapted to form acrimp or a series of radial dentations 31 in the bottom of the chimney3, similar to those shown at its upper end. The rotating portion 2 ofthe device is formed with a series of blades 22,

(shown as four in number,) adapted to form the neck or lower portion 32of the chimney. As shown, the blades 22 have a slight abrupt shoulder 23at their lower ends, by which the lower edge of the portion 32 of thechimney is forced outward to form a bead 33. i

The operation of the device will be readily understood from aninspection of the drawings. It is found desirable in practice to producea lamp chimney of the usual sun form, the lower edge of which is crimpedor dentated, as shown, to permit air to pass thereunder to producebetter combustion in the flame of the lamp. It is also advantageous toproduce on the outer side of the neck of the chimney a head, over whichthe springs of the lamp-burner may engage to prevent the disengagementof the chimney therefrom. When my device is placed within the horse orlathe and the hot chimney, previously blown by hand or machine, appliedthereto, it is evident that the teeth 13 in the socket 1 will act toproduce the desired indented or crimped effect at the lower edge of thechimney, while the flange 12 will determine the exact outer size of the.chimney at its lower end. The rotating blades 21 will act to shape thechimney to the exact size required and by reason of the shoulders 23 attheir lower ends will force outward a portion of the glass to form thehead 33 at the foot of the chimney.

It will be seen that a single and rapid operation is all that isnecessary to size the chimney, to form the head on its outer edge, andto crimp its lower end. The finished chimney is then taken by thegatherer to the leer and annealed in the usual manner. It is evidentthat in some cases it might be desirable to form either the shoulder 33or the dentations 31 without the other and that for this purpose eitherthe shoulder 23 on the blades 22 or the teeth 13 in the socket 1 mightbe omitted. It is also evident that other changes may be made in mydevice without departing from the spirit of the invention.

It will be noted that the abrupt head at the extreme lower end of thechimney is formed by the action of the shoulders 23 in the blades 2-2without any positive forcing inward of the metal above the bead by anyinwardly-projecting flange or the like. It will also be noted that thecylindric flange 1 2 on the socket 1 is of substantially equal diameterits entire length and freely admits the lower end of the chimney andpermits it to be withdrawn therefrom.

What I claim is 1. A finishing-tool comprising a stationary socket and arotatable opening portion, the socket having a transverse flangeprovided with teeth adapted to produce indentations in the lower edge ofthe chimney or other article applied thereto, and with a smoothcylindric flange exterior of said teeth for determining the outerdiameter of the lower end of such chimney or other article.

2. A finishing-tool comprising a stationary socket having a smoothcylindric flange, and a rotatable opening portion provided with radialblades having abrupt shoulder portions at their lower ends within saidflange, whereing Witnesses.

EMIL KREBS. Witnesses:

MARGARET KREBs, H. C. AUSTILL.

